Angle bar assembly method for deviating a material web

ABSTRACT

The invention relates to an angle bar assembly that comprises a first angle bar around ( 7 ) which a material web is wrapped for redirecting the feed of the material web and a table roll ( 14 ) around which the material web is wrapped. When looked at from a plane defined by a section of the material web extending between the first angle bar and the table roller, the first angle bar and the idler roll are mounted so as not to overlap.

[0001] The invention relates to a turning bar arrangement and a methodfor redirecting a web of material in accordance with the preambles ofclaims 1, 2, 10 or 11.

[0002] Webs of material, in particular paper webs, whose width is amultiple of the finished printed products, are generally imprinted inrotary printing presses. In order to produce the finished printedproduct from the imprinted web it is necessary to cut this web into aplurality of partial webs, which are initially conducted next to eachother but must be placed on top of each other in order to be furtherprocessed into the finished printed product, mainly by folding in thelongitudinal and transverse directions and transverse cutting. In thecourse of the transverse cutting of the webs of material placed on topof each other it is important that printed pages on the individual websof material are exactly aligned in phase with each other, so that allwebs of material are cut at the borders of respectively two sides duringtransverse cutting. Register rollers are employed for this purpose,whose adjustability makes it possible to set the length of each path ofthe web of material by means of the turning bar arrangement in such away that sides which are intended to be processed into a signature, onthe various webs come to rest exactly on top of each other.

[0003] An example of such a turning bar arrangement is known from U.S.Pat. No. 3,734,487. This turning bar arrangement comprises a firstturning bar which can be displaced transversely in relation to the feeddirection of the web of material to be redirected, as well as tworegister rollers and one register roller. The register roller can bedisplaced in a plane located underneath the turning bars. If it isintended to place a large number of webs of material on top of eachother, a stack of four turning bar arrangements placed on top of eachother is employed. However, an already small number of webs of material,which are to be placed on top of each other, is sufficient for the stackof this known turning bar arrangement to become higher than a man, whichconsiderably complicates its maintenance and the draw-in of the webs ofmaterial in case of a change in orders.

[0004] An arrangement for offsetting narrow paper webs in the form ofpartial paper webs is known from DE 38 16 900 A1.

[0005] DE-AS 17 61 899 discloses turning bars offset in height.

[0006] U.S. Pat. No. 3,734,487 shows two turning bars arranged in theshape of a triangle, from which a web of material can be conducted ontoa register roller.

[0007] EP 0 784 590 B1 shows a turning arrangement wherein a guideroller and the turning bars have different diameters. The turning bars,which are arranged at 90° in respect to each other, have the samediameter.

[0008] The object of the invention is based on providing a turning bararrangement and a method for redirecting a web of material.

[0009] In accordance with the invention, this object is attained bymeans of the characteristics of claims 1, 2, 10 or 11.

[0010] The advantages which can be achieved by means of the inventionrest in particular in that it is possible to keep the structural heightof the turning bar arrangement low, so that the number of turning bararrangements which can be mounted on top of each other within apredetermined structural height is increased. Thus the number of webs ofmaterial which can be placed on top of each other in a stack of turningbar arrangements can be increased without the stack needing to be of aheight which would make it difficult for an operator to reach theindividual turning bars of the stack for maintaining them or fordrawing-in a web of material.

[0011] A section of the web extending between the first turning bar andthe register roller defines a first plane which, in customary turningbar arrangements, is substantially horizontal. Since, viewed in adirection which is perpendicular to this first plane, the turning barand the register roller do not overlap, they can be arrangedoverlapping, viewed in a direction parallel to this plane, so that thestructural height can be reduced.

[0012] A particularly effective use of the available structural volumeresults when the first turning bar and the register roller are arrangedon the same side of this first plane.

[0013] If the register roller has a larger diameter than the firstdirection-changing bar, the web of material conducted around thedirection-changing bar and the register roller can be drawn off crossingthe direction-changing bar without additional direction-changingelements being required for this.

[0014] A second turning bar is required for a turning bar arrangementwhose delivery direction is parallel with the feed direction of the web,and the web of material can usefully be looped in sequence around thefirst turning bar, the register roller and the second turning bar.

[0015] If at least one of the two turning bars can be changed over froman orientation wherein it is parallel in respect to another turning bar,into an orthogonal orientation, this permits the selective operation ofthe turning bar arrangement in parallel, or in anti-parallel feed anddelivery directions.

[0016] A rapid and exact change of the orientation of the changeableturning bar is achieved if the turning bar can be rotated about an axiswhich intersects the turning bar at a distance from one of itslongitudinal ends, and if a marking is applied on this linear end whichcan be made to coincide in the parallel or orthogonal orientation withrespectively one of two complementary markings on a support of theturning bar. Thus, when changing the turning bar over it is sufficientto check the coincidence of the markings in order to be assured that theangles of the turning bars are set exactly.

[0017] The exact setting of the turning bar is additionally simplifiedif the markings have a three-dimensional shape and can be brought intointerlocking contact. With a construction of this type the engagement ofthe markings already assures an exact orientation of the turning bar,without it being necessary for an operator to elaborately check theorientation.

[0018] Exemplary embodiments of the invention are represented in thedrawings and will be described in greater detail in what follows.

[0019] Shown are in:

[0020]FIG. 1, a schematic view from above on a turning bar arrangementin accordance with the present invention;

[0021]FIG. 2, a plan view of the turning bar arrangement of FIG. 1 fromthe direction of the arrow II in FIG. 1;

[0022]FIG. 3, a stack of turning bar arrangements for placing aplurality of webs of material on top of each other;

[0023]FIG. 4, a plan view of a second embodiment of the turning bararrangement viewed from the same perspective as in FIG. 2;

[0024]FIG. 5, a plan view of a third embodiment of the turning bararrangement.

[0025]FIG. 1 shows a view from above on a first turning bar arrangementin accordance with a first embodiment of the present invention. Twoguide profiles 02, on each of which a support 03, 04 for a turning bar06, or 07, is displaceably and arrestably arranged extend, verticallystepped on different planes, between two lateral frames 01, which areconnected with corresponding lateral frames of a longitudinal cuttingapparatus (not represented) which is located in front of the turning bararrangement. The lateral frames 01 of the turning bar arrangement areapproximately aligned with the lateral frames of printing units of anassociated rotary printing press. Here, the longitudinal end of a firstone of these turning bars 07 is rigidly connected with its support 04.The support 03 of the second turning bar 06 is connected with a shaft09, which can be rotated around a horizontal axis parallel with theplane of FIG. 1, wherein the axis crosses the second turning bar 06 at adistance from the longitudinal end 11 of the latter facing the support03. The shaft 09 can be fixed in place with the aid of a clamping lever12 attached to the support 03. The support 03 has two markings 13, whichhere are embodied as protrusions and whose exact position on the support03 can be adjusted in three spatial positions. On its longitudinal end11, the second turning bar 06 has a complementary marking in the form ofa recess, which is shaped in such a way that it permits an interlockingengagement with one of the markings 13. It is possible to assure bymeans of a suitable adjustment of the positions of the markings 13 thatthe second turning bar 06 in its position represented in FIG. 1 isexactly parallel with the first turning bar 07 or, following theswiveling of the second turning bar 06 by 180° about the axis of theshaft 09 and the engagement of the markings 13, it is oriented exactlyorthogonally in respect to the first turning bar 07.

[0026] Each of the supports 03, 04 have connectors 08 for compressedair, which is conducted through bores in the support 03 or 04 into theturning bar 06, or 07, and exits through bores on the circumferentialsurface of the turning bars 06, or 07, in order to form an air cushionbetween the turning bars 06, 07 and a web 22 of material looped aroundthem.

[0027] Respectively laterally outside of the lateral frames 01, aregister roller 14 is mounted on the side of the first turning bar 07,and a deflection roller arrangement 16 on the side of the second turningbar 06. The register roller 14 is mounted on a sliding block 18, whichcan be displaced along a rail 17. A threaded body 19, which is fixedlyconnected with the sliding block 18, is in engagement with a threadedrod 21, which can be rotatingly driven by a motor (not represented) inorder to displace the register roller 14 in the direction of thetwo-headed arrow P. The register roller 14 is arranged outside of eachplane determined by print units associated with the respective lateralframe, and outside of a space located between the planes.

[0028] In FIG. 1, the web 22 of material is represented transparent;only its edges are emphasized by heavy lines. The web 22 of material issequentially looped around the second turning bar 06, the deflectionroller arrangement 19, the register roller 14 and the first turning bar07. It is assumed for the purposes of the present description that it isbeing moved in the direction of an arrow T; a movement in the oppositedirection would of course also be possible. An arriving section 23extends from the inlet of the turning bar arrangement as far as thesecond turning bar 06. As can be seen in FIG. 2 in particular, the web22 of material is looped around the second turning bar 06 from top tobottom, reaches the deflection roller arrangement 16, is turned there by180° and extends at a short distance from the underside of the secondturning bar 06 transversely through the entire turning bar arrangementto the top of the register roller 14. A section 26 of the web 22 ofmaterial extends from the underside of the register roller 14 in a planeE to the underside of the first turning bar 07. The web 22 of materialis looped around the first turning bar 07 from the bottom to the top, sothat a departing section 24 of the web 22 of material finally leaves theturning bar arrangement from the top of the turning bar 07.

[0029] As can be easily seen, the arrangement of the turning bararrangement 16 and of the register roller 14, laterally offset on theother side of the lateral frames 01 and outside of the movement area ofthe turning bars 06, 07 along the guide profile 02, makes it possible tokeep the structural height of the turning bar arrangement low. Since thediameter of the register roller 14 is greater than that of the firstturning bar 07, both can be arranged on the same side of the plane E,which contributes to a further reduction of the structural height. Sincethe register roller 14, as well as the first turning bar 07 are locatedabove the plane E, which is defined by the section 26 of the web 22 ofmaterial extending between the register roller 14 and the first turningbar 07, the height difference between the incoming and outgoing sections23, 24 can be kept still smaller than would correspond to the structuralheight of the turning bar arrangement.

[0030]FIG. 3 shows, greatly schematized, a stack in which a plurality ofturning bar arrangements 27 of the type represented in FIGS. 1 and 2 arearranged on top of each other, viewed from the direction of the arrow IVin FIG. 1. The stack here comprises four turning bar arrangements 27placed on top of each other, but their number can also be greater orlesser. A tensing roller arrangement 28 for keeping two webs 22, 29 ofmaterial stretched, which are fed in parallel by a cutting device (notrepresented), is assigned to each turning bar arrangement 27. The web 22of material is conducted over the turning bar arrangement 27 to a firstdeflection roller 31, the second web 29 of material moves from thetensing roller arrangement 28 directly to a deflecting roller 32. Thelateral offset between the webs 22, 29 of material is compensated bymeans of the turning bar arrangement 27, so that they can be conductedto a folding apparatus (not represented) for folding and cutting withtheir edges overlapping exactly and also in phase with each other bymeans of a suitable setting of the position of the register roller 14.

[0031]FIG. 4 shows a second embodiment of the turning bar arrangementviewed from the same perspective as in FIG. 2. With the embodiment ofFIG. 4, the incoming section 23 of the web 22 of material is conductedto the underside of the second turning bar 06, is looped around it fromthe bottom to the top, then turns from top to bottom around a deflectionroller 33, which replaces the deflection roller arrangement 16 in FIG.2, reaches the register roller 14, which can be displaced in thedirection of the arrow P, and from there on runs as described inconnection with FIG. 2. With this variation the height differencebetween the incoming and outgoing sections 23, or 24, is minimal.

[0032]FIG. 5 shows a plan view of a third embodiment of the turning bararrangement from a perspective analogous to that of FIGS. 2 and 4. Thesame as in the second embodiment of FIG. 4, elements corresponding toelements of the first embodiment and already described in connectionwith FIGS. 1 and 2, are provided with the same reference symbols andwill not be described again. The structural height of the turning bararrangement in this third embodiment is further reduced in that bothturning bars 06, 07 are arranged in a mutual plane E. The incoming andoutgoing sections 23, 24 are located on the same level. The supports 03,04 (not visible in FIG. 5) are mounted on a single guide profile 02.While with the two previously described variations the two turning bars06, 07 could be moved as close to each other as desired, and could evenbe displaced above each other, this is not possible with the variationof FIG. 5. However, no substantial limitation in their usefulness isconnected with this, because in most cases the webs 22 of material,which are placed on top of each other with the aid of the turning bararrangement, are partial webs obtained from a uniform web bylongitudinal cutting which, so that they can be placed on top of eachother, must be displaced by at least their own width. The distancebetween the turning bars 06, 07 needed for this can also be easily setwith this third embodiment. In order to be able to use the embodiment ofFIG. 5 for the parallel displacement of a web selectively in oppositedirections, it is sufficient that both turning bars 06, 07 can bechanged over as described in FIG. 1 in connection with the secondturning bar 06, so that the turning bar arrangement can be changed intoits mirror reversed configuration.

[0033] All turning bars 06, 07, deflection rods 16, 33 and the registerrollers 14 are preferably designed as cantilevered arms, i.e. only oneend is seated.

LIST OF REFERENCE SYMBOLS

[0034]01 Lateral frame

[0035]02 Guide profile

[0036]03 Support

[0037]04 Support

[0038]05 -

[0039]06 Turning bar, second

[0040]07 Turning bar, first

[0041]08 Compressed air line

[0042]09 Shaft

[0043]10 -

[0044]11 Longitudinal end

[0045]12 Clamping lever

[0046]13 Marking

[0047]14 Register roller

[0048]15 -

[0049]16 Deflection roller arrangement

[0050]17 Rail

[0051]18 Sliding block

[0052]19 Threaded body

[0053]20 -

[0054]21 Threaded rod

[0055]22 Web of material

[0056]23 Section, incoming (22)

[0057]24 Section, outgoing (22)

[0058]25 -

[0059]26 Section (22)

[0060]27 Turning bar arrangement

[0061]28 Tensing roller arrangement

[0062]29 Web of material

[0063]30 -

[0064]31 Deflection roller

[0065]32 Deflection roller

[0066]33 Deflection roller

[0067] P Two-headed arrow, direction

[0068] T Arrow, direction

[0069] E Plane

1. A turning bar arrangement with a first turning bar (07), around whicha web (22) of material can be looped, for changing the direction ofrunning of the web (22) of material, and a register roller (14), aroundwhich a web (22) of material can be looped, wherein a section (26) ofthe web (22) of material extending between the first turning bar (07)and the register roller (14) defines a first plane (E), characterized inthat, viewed in a direction perpendicular in respect to the plane (E),the first turning bar (07) and the register roller (14) are arranged sothey do not overlap, and the register roller (14), as well as theturning bar (07), are seated only on one side.
 2. A turning bararrangement with a first turning bar (07), around which a web (22) ofmaterial can be looped, for changing the direction of running of the web(22) of material, and a register roller (14), around which a web (22) ofmaterial can be looped, wherein a section (26) of the web (22) ofmaterial extending between the first turning bar (07) and the registerroller (14) defines a first plane (E), characterized in that, viewed ina direction perpendicular in respect to the plane (E), the first turningbar (07) and the register roller (14) are arranged so they do notoverlap, and that the register roller (14) is arranged outside oflateral frames (01) arranged parallel with the conveying direction (T)of the web (22) of material.
 3. The turning bar arrangement inaccordance with claim 1, characterized in that the first turning bar(07) and the register roller (14) are arranged on the same side of theplane (E).
 4. The turning bar arrangement in accordance with claim 1 or3, characterized in that the register roller (14) has a larger diameterthan the first turning bar (07).
 5. The turning bar arrangement inaccordance with one of the preceding claims, characterized in that itincludes a second turning bar (06), and that the web (22) of materialcan be looped sequentially around the first turning bar (07), theregister roller (14) and the second turning bar (06).
 6. The turning bararrangement in accordance with claim 5, characterized in that at leastone of the two turning bars (06) can be changed from an orientation inwhich it is parallel with the other turning bar (07) into an orthogonalorientation.
 7. The turning bar arrangement in accordance with claim 6,characterized in that the changeable turning bar (06) can be rotatedabout an axis which intersects the turning bar (06) at a distance fromone of its longitudinal ends (11), and that a marking (13) is attachedto the longitudinal end (11), which in the parallel or in the orthogonalorientation, can be brought into coincidence with respectively one oftwo complementary markings (13) on a support (03) of the turning bar(06).
 8. The turning bar arrangement in accordance with claim 7,characterized in that the markings (13) have a three-dimensional shapeand can be brought into interlocking engagement.
 9. The turning bararrangement in accordance with one of claims 5 to 8, characterized by atleast one deflection roller arrangement (16), around which the web (22)of material can be looped between the register roller (14) and thesecond turning bar (06) wherein, viewed in a direction perpendicular tothe plane (E), the turning bars (06, 07) and the deflection rollerarrangement (16) are arranged so they do not overlap.
 10. A method forredirecting a web (22) of material, having the following steps: the web(22) of material arriving in the conveying direction (T) is conducted tothe top of a first turning bar (07), this web (22) of material isredirected by the first turning bar (07) transversely in respect to theconveying direction (T), and conducted from the underside of the firstturning bar (06) to the underside of a deflection roller (16), the web(22) of material extending transversely in respect to conveyingdirection is reversed by 180° by the deflection roller (16) andconducted from the top of the deflection roller (16) to the top of aregister roller (18), the web (22) of material is reversed by 180° bythe register roller (28) and is conducted from the underside of theregister roller (18) to the underside of a second turning bar (07), theweb (22) of material is redirected from the top of the second turningbar (07) in the conveying direction (T).
 11. A method for redirecting aweb (22) of material, having the following steps: the web (22) ofmaterial arriving in the conveying direction (T) is conducted to the topof a first turning bar (07), this web (22) of material is redirected bythe first turning bar (07) transversely in respect to the conveyingdirection (T), and conducted from the top of the first turning bar (06)to the top of a deflection roller (16), the web (22) of materialextending transversely in respect to conveying direction is reversed by180° by the deflection roller (16) and conducted from the underside ofthe deflection roller (16) to the top of a register roller (18), the web(22) of material is reversed by 180° by the register roller (28) and isconducted from the underside of the register roller (18) to theunderside of a second turning bar (07), the web (22) of material isredirected from the top of the second turning bar (07) in the conveyingdirection (T).
 12. The method in accordance with claim 10, characterizedin that the web (22) of material extending transversely in respect tothe conveying direction (T) is conducted above the first turning bar(06) and the second turning bar (07).
 13. The method in accordance withclaim 10 or 11, characterized in that the web (22) of material extendingtransversely in respect to the conveying direct (T) is conducted betweenthe first turning bar (06) and the second turning bar (07).